ICD-10-CM
ICD-10 code for Disease, diseased myoneural: G70.9
The ICD-10-CM index points "Disease, diseased myoneural" to G70.9, Myoneural disorder, unspecified. G70.9 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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More specific codes in G70
A header groups codes and is not billed. A billable code is one you can report. Listed second marks a billable manifestation code (its CDC title says it is "classified elsewhere"): code the underlying disease or condition first, then this code.
- G70Myasthenia gravis and other myoneural disordersHeader
- G70.0Myasthenia gravisHeader
- G70.00Myasthenia gravis without (acute) exacerbationBillable
- G70.01Myasthenia gravis with (acute) exacerbationBillable
- G70.1Toxic myoneural disordersBillable
- G70.2Congenital and developmental myastheniaBillable
- G70.8Other specified myoneural disordersHeader
- G70.80Lambert-Eaton syndrome, unspecifiedBillable
- G70.81Lambert-Eaton syndrome in disease classified elsewhereListed second
- G70.89Other specified myoneural disordersBillable
- G70.9Myoneural disorder, unspecifiedBillable
Excludes1
Excludes1 means these codes are not reported together.
From G70. A note on a category applies to every code under it.
Related conditions
Related pages
- G70.9 code detailsNotes, nearby codes, CMS-HCC group
- Category G70Every code under it
- Chapter 6Diseases of the nervous system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Disease, diseased myoneural?
The ICD-10-CM index points "Disease, diseased myoneural" to G70.9, Myoneural disorder, unspecified. G70.9 is a billable code.
Is G70.9 billable?
Yes. G70.9 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to G70.9?
The CDC tabular list gives 2 Excludes1 notes (not coded together) for G70.9 and the categories above it. They are listed on this page.
What chapter is G70.9 in?
Chapter 6. Diseases of the nervous system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.